They are either forged or bent wire construction with forged being better for increased load and stress bearing

For interior and exterior use

Adjustable clamp fits diameter 25 mm (1") poles

More information:

Constructed with a 14"x17" D-Grip handle

STRETCH FILM, CLEAR, 18x1500, 80 G, 1 ROLL They are either forged orSTRETCH FILM, CLEAR, 18" x 1500', 80 GAUGE EXTREME HOLDING FILM, 1 ROLL EXTREMELY STRONG AND TEAR RESISTANT: High performance Stretch premium film with high puncture resistance that is tacky on both sides providing greater cling strength and pallet load stability. THIS 55 GAUGE HIGH PERFORMANCE SHRINK FILM: It replaces 80 gauge low performance films.